﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace OpenWeb.Dal.Interfaces
{
    /// <summary>
    /// A collection of objects that has been split into pages.
    /// </summary>
    public interface IPagination : IEnumerable
    {
        /// <summary>
        /// The current page number
        /// </summary>
        int PageNumber { get; }
        /// <summary>
        /// The number of items in each page.
        /// </summary>
        int PageSize { get; }
        /// <summary>
        /// The total number of items.
        /// </summary>
        int TotalItems { get; }
        /// <summary>
        /// The total number of pages.
        /// </summary>
        int TotalPages { get; }
        /// <summary>
        /// The index of the first item in the page.
        /// </summary>
        int FirstItem { get; }
        /// <summary>
        /// The index of the last item in the page.
        /// </summary>
        int LastItem { get; }
        /// <summary>
        /// Whether there are pages before the current page.
        /// </summary>
        bool HasPreviousPage { get; }
        /// <summary>
        /// Whether there are pages after the current page.
        /// </summary>
        bool HasNextPage { get; }
    }


    /// <summary>
    /// Generic form of <see cref="IPagination"/>
    /// </summary>
    /// <typeparam name="T">Type of object being paged</typeparam>
    public interface IPagination<T> : IPagination, IEnumerable<T>
    {

    }
}
